Assessment of self-doped poly (5-nitro-2-orthanilic acid) as a scaling inhibitor to control the precipitation of CaCO3 and CaSO4 in solution

Abstract

Self-doped- and nitro-polyanilines have become a widely used strategy to optimize the electronic and vibratory spectra of polymeric building blocks in various applications. We report the synthesis of poly (5-nitro-2-orthanilic acid) by an aniline-initiated oxidative polymerization reaction. The polymer is characterized by spectroscopic techniques, elemental shapes, cyclic voltammetry, electrical conductivity, and microscopic and thermal measurements. The hydrophilic and hydrophobic nature of the supports provided the formation of amphiphilicity as judged by SEM. Thermogravimetric measurements reveal thermal stability up to 500 °C and glass temperature (Tg) observed at 240 °C. Electrical conductivity decreases as the temperature rises at the different frequencies used, reflecting the semiconducting nature in the extrinsic range, which is characterized by high carriers and low mobility. The presence of these electron residues causes a decrease in efficiency and increases the thermal conductivity. Dielectric measurements have shown that permittivity decreases gradually at lower levels, mainly due to the transport of charging carriers, resulting in higher performance. The testing of the copolymer as a new scale blocker has resulted in moderate to fairly high performance. This effect is attributed to the change in polymer geometry using intramolecular H-bonding group -SO3H and a chain polymer in an aqueous medium.

Poly (aniline-co-aniline-2,5-disulfonic acid) / L-ascorbic acid / Ag@SiO2 / polysafranin nanocomposite: synthesis, characterization and anomalous electrical behaviour

“…Energy-dispersive X-ray spectroscopy (EDXS) was used to observe the morphologies of the polymers by scanning electron microscopy (SEM) (JEOL-JSMIT 200, Japan) and transmission electron microscopy (TEM) (JEOL-JTM-1400 plus, Japan) at the E-Microscope Unit, Faculty of Science, Alexandria University. The samples were sonicated in deionized water for 5 min, deposited onto carbon-coated copper mesh and allowed to air dry before examination [ 21 – 24 ].…”

“…As part of an ongoing project directed to research the use of PANI and its functionalized analogues as multifunctional substrates for industrial application [ 21 – 24 ], we recently reported the chemical synthesis and characterization of poly(aniline-co-aniline-2,5-disulfonic acid) and its composite containing L-hexuronic acid (Fig. 1 ) and metallic Ag/SiO 2 nanoparticles as an efficient, new, thermally stable anionic polyelectrolyte to remove safranin dye from aqueous media [ 25 ].…”

Poly (aniline-co-aniline-2,5-disulfonic acid) / L-ascorbic acid / Ag@SiO2 / polysafranin nanocomposite: Synthesis, characterization and anomalous electrical behaviour

“…As part of an ongoing project directed to research in the field of using PANI and its functionalized analogues as multifunctional substrates for industrial application [21][22][23][24], we recently reported the chemical synthesis and characterization of poly(aniline-co-aniline-2,5disulfonic acid) and its composite containing L-hexuronic acid, Fig. 1, and metallic Ag/SiO2 nanoparticles, as an efficient, new, thermally stable anionic polyelectrolyte to remove safranin dye from aqueous media [25].…”

Efficient removal of safranin from aqueous solution using a new type of metalated highly self-doped polyaniline nanocomposite

“…As a part of an ongoing project directed to new findings in the field of water treatment using functionalized polyanilines as highly promising candidates [18,19,20,21], we investigated the use of (aniline-co-aniline-2,5-disulfonic acid)/L-hexuronic acid/Ag@SiO 2 nanocomposites as a new highly anionic polyelectrolyte with an enhanced adsorptive effect for removing the cationic dye safranin. The incorporation of disulfonated units into the polymer chain should double the sulfonate groups on the backbone and produce regular molecular structure polymers with a higher sulfonation degree [22].…”